Specification: Material:Metal Color:white,red,blue,black Size:63*18*7mm Read Rate: 12Mb-18Mb/S Write Rate: 6-10 Mb/S Interface : USB 2.0 and type C Excellent USB Memory in excellent condition Operating Temp: -10 to +55Deg.C Storage Temp: -20 to +55Deg.C Life:>1 million times About capacity: 4GB=approx 3.6GB-3.8GB 8GB=approx 7.4GB-7.6GB 16GB=approx 14.4GB-14.8GB 32GB=approx 28.5GB-30GB 64GB=approx 58.5GB-60GB 128GB=approx 110.5GB-120GB Vendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MB Calculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB; So there are some differences between display capacity and nominal capacity of flash memory products. Package included: Type - C USB Flash Drive x 1 Attention: To avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer. Please do not remove your USB flash drive when it is being used otherwise your data may loss. After using USB flash drive, it is better to remove it from device as soon as possible. That will helps to extend its storage lifetime. Please do not format your USB flash drive frequently, otherwise the USB will be damaged easily. With a USB Type-C connector and a USB 2.0 connector, the USB C dual flash drive lets you quickly transfer files between smartphones, tablets, laptops, and computers. Supports hot plug & play, no external power supply required, USB bus-powered.No physical drive required. Support all current computer systems.The USB C flash drive is compatible with computers, laptops, tablets, smartphones with USB Type-C port. Speeds vary depending on types of file being transferred and computer configuration. Support nearly all mobile phones which support OTG function. You will get 2-in-1 Flash drive x 1(8/16/32/64/128GB Optional).